一体化工艺中反硝化聚磷菌比例测定研究  

Determination of Denitrifying Phosphorus Accumulating Organisms Proportion in Integrated Process

作　　者：荆肇乾[1] 吕锡武[2] 

机构地区：[1]南京林业大学土木工程学院,江苏南京210037 [2]东南大学环境科学与工程系,江苏南京210096

出　　处：《环境科学与技术》2009年第9期1-4,共4页Environmental Science & Technology

基　　金：国家"863"高技术研究发展计划(2002AA601012-1A);江苏省科技攻关计划资助项目(BE2001035)

摘　　要：反硝化聚磷菌可以在缺氧条件下利用硝酸盐氮和亚硝酸盐氮作为电子受体完成吸磷过程,确定反硝化聚磷菌比例对于强化反硝化除磷作用具有重要意义。从一体化活性污泥工艺中取污泥混合液,加入蔗糖合200mg/LCOD后进行厌氧搅拌,2h后将厌氧污泥分成三等份,其中两份分别加入10mg/LNO3--N、10mg/LNO2--N后缺氧搅拌2h,另一份用充氧仪曝气2h。根据厌氧、缺氧/好氧交替过程中不同电子受体下的除磷量,可以简便的确定反硝化聚磷菌在全部聚磷菌中的比例,结果表明该一体化工艺中反硝化聚磷菌在全部聚磷菌中的比例达到98.92%。Denitrifying phosphorus accumulating organisms （DPAOs） can accomplish phosphorus uptake with nitrate and nitrite as electron acceptors under anoxic conditions. It is vital for enhanced denitrifying phosphorus removal to quantify the proportion of DPAOs. Mixed liquor was derived from an integrated activated sludge process and mixed with 200mg/L COD （sucrose） under anaerobic conditions. After two hours, anaerobic sludge was divided, into three parts, and two of them were exposed to anoxic condition with 10mg/L nitrate and 10mg/L nitrite respectively for 2h, while the other was exposed to aerobic condition with an aerator for 2h. According to phosphorus removal capacity in anaerobic/anoxic and aerobic alternation with different electron acceptors, proportion of DPAOs in total phosphorus accumulating organisms （PAOs） could be determined simply and explicitly. Results indicated that proportion of DPAOs was up to 98.92% of all PAOs in integrated process.

关 键 词：反硝化聚磷菌 电子受体 除磷量 一体化活性污泥工艺 

分 类 号：X703.1[环境科学与工程—环境工程]